The specified type was not recognized error deserializing XML

问题:

I'm trying to deserialize the following XML using C#:

<stix:STIX_Package xmlns:stixVocabs="http://stix.mitre.org/default_vocabularies-1"      xmlns:stixCommon="http://stix.mitre.org/common-1"      xmlns:stix="http://stix.mitre.org/stix-1"      xmlns:indicator="http://stix.mitre.org/Indicator-2"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      id="repository:03163c66-23ed-4e7f-8814-be1d08406" version="1.0">     <stix:Indicators>         <stix:Indicator id="repository:9df9af32-3b29-4482-81ac-9c090a44db8c"             xsi:type="indicator:IndicatorType" negate="false" version="2.0">             <indicator:Title>admin on 24th September 2014 - (1) FileObjects</indicator:Title>             <indicator:Type xsi:type="stixVocabs:IndicatorTypeVocab-   1.0">Exfiltration</indicator:Type>             <indicator:Description>Some Ex filtration Happened</indicator:Description>         </stix:Indicator>         <stix:Indicator id="repository:9df9af32-3b29-4482-81ac-9c090a44db8d" xsi:type="indicator:IndicatorType" negate="false" version="2.0">             <indicator:Title>admin on 24th September 2014 - (2) FileObjects</indicator:Title>             <indicator:Type xsi:type="stixVocabs:IndicatorTypeVocab-1.0">Exfiltration</indicator:Type>             <indicator:Description>Some Ex filtration Happened Again</indicator:Description>         </stix:Indicator>     </stix:Indicators> </stix:STIX_Package> 

My class structure:

[XmlType(AnonymousType = true, Namespace = "http://stix.mitre.org/stix-1")] [XmlRoot(Namespace = "http://stix.mitre.org/stix-1", IsNullable = false)] public class STIX_Package {     [XmlArrayItemAttribute("Indicator", IsNullable = false)]     public IndicatorType[] Indicators { get; set; }      [XmlAttribute]     public string id { get; set; }      [XmlAttribute]     public decimal version { get; set; } }  [XmlRoot(ElementName = "Indicator")] [XmlType("Indicator", Namespace = "http://stix.mitre.org/stix-1")] public class IndicatorType : IndicatorBaseType {     [XmlElement("Title", Namespace = "http://stix.mitre.org/Indicator-2")]     public string Title { get; set; }      [XmlElement("Type", Namespace = "http://stix.mitre.org/Indicator-2")]     public List<ControlledVocabularyStringType> Type { get; set; }      [XmlElement("Description", Namespace = "http://stix.mitre.org/Indicator-2")]     public StructuredTextType Description { get; set; }      [XmlAttribute, System.ComponentModel.DefaultValueAttribute(false)]     public bool negate { get; set; } }  [XmlRoot(ElementName = "Indicator")] [XmlInclude(typeof(IndicatorType))] public class IndicatorBaseType {     [XmlAttribute]     public XmlQualifiedName id { get; set; }      [XmlAttribute]     public string version { get; set; } }  public class ControlledVocabularyStringType {     public string vocab_name { get; set; }      public string vocab_reference { get; set; }      [XmlText]     public string Value { get; set; } } 

My deserialization code:

using (var stream = new StreamReader("Test.xml")) {     var xml = new XmlSerializer(typeof(STIX_Package));      return (STIX_Package) xml.Deserialize(stream); } 

Deserialization produces the error:

"System.InvalidOperationException: There is an error in XML document (3, 10). ---> System.InvalidOperationException: The specified type was not recognized: name='IndicatorType', namespace='http://stix.mitre.org/Indicator-2', at http://stix.mitre.org/stix-1'>."

How do I structure/annotate my POCOs so that the XML above can be deserialized?

回答1:

Ok, I've managed to deserialize your xml by altering the IndicatorType class. I've changed the namespace on the IndicatorType class and the namespace on the Type property

[XmlRoot(ElementName = "Indicator")] [XmlType(Namespace = "http://stix.mitre.org/Indicator-2", TypeName = "IndicatorType")] public class IndicatorType : IndicatorBaseType {     [XmlElement("Title", Namespace = "http://stix.mitre.org/Indicator-2")]     public string Title { get; set; }      [XmlElement("Type", Namespace = "http://stix.mitre.org/default_vocabularies-1")]     public List<ControlledVocabularyStringType> Type { get; set; }      [XmlElement("Description", Namespace = "http://stix.mitre.org/Indicator-2")]     public string Description { get; set; }      [XmlAttribute, System.ComponentModel.DefaultValueAttribute(false)]     public bool negate { get; set; } } 

If you check out the XML you can see that the elements are in a different namespace. These are defined in the root element of your XML

<stix:Indicator xsi:type="indicator:IndicatorType"> <---HERE   <indicator:Title>admin on 24th September 2014 - (1) FileObjects</indicator:Title>   <indicator:Type xsi:type="stixVocabs:IndicatorTypeVocab-1.0">Exfiltration</indicator:Type> <--- HERE   <indicator:Description>Some Ex filtration Happened</indicator:Description> </stix:Indicator> 

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